I am new to PHPBB. I had a need to integrate PHPBB with my web application written in C#. Hence, I added a web API to PHPBB. I took the existing PHPBB code as the base and then modified that. This API has a separate set of files and does not modify any of the existing files at all. So, in a sense, this is not a 'mods' as this does not change the core functionality / code of PHPBB.
I think the API could be useful to others in the community as well and would like to share this with them. So, what are my options:
1) As per the GNU license, simply post the source code on my public website
2) Submit the API as a 'mod'
3) Create a new project on sourceforge and publish API there